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LynxOS: Resume the same thread when receiving a thread create/exit event. 

Before this patch, the ptid passed to lynx_resume was completely
ignored, and we used the current_inferior. This resulted in trying
to resume the inferior execution using the wrong ptid after having
received a thread create/exit event, because the inferior_ptid
was still set to the ptid prior to receiving the signal.

gdb/gdbserver/ChangeLog:

        * lynx-low.c (lynx_resume): Use the resume_info parameter
        to determine the ptid for the lynx_ptrace call, unless
        it is equal to minus_one_ptid, in which case we use the
        ptid of the current_inferior.
        (lynx_wait_1): After having received a thread create/exit
        event, resume the inferior's execution using the signaling
        thread's ptid, rather than the old ptid.
This commit is contained in:
Joel Brobecker 2013-01-07 11:39:00 +00:00
parent 7fda33ae8d
commit 3f6e77ef16
2 changed files with 17 additions and 4 deletions
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10
gdb/gdbserver/ChangeLog
View File

@ -1,3 +1,13 @@
2013-01-07 Joel Brobecker <brobecker@adacore.com>
* lynx-low.c (lynx_resume): Use the resume_info parameter
to determine the ptid for the lynx_ptrace call, unless
it is equal to minus_one_ptid, in which case we use the
ptid of the current_inferior.
(lynx_wait_1): After having received a thread create/exit
event, resume the inferior's execution using the signaling
thread's ptid, rather than the old ptid.
2013-01-07 Joel Brobecker <brobecker@adacore.com>
* lynx-low.c (lynx_resume): Delete variable ret.

11
gdb/gdbserver/lynx-low.c
View File

@ -349,14 +349,17 @@ lynx_attach (unsigned long pid)
static void
lynx_resume (struct thread_resume *resume_info, size_t n)
{
ptid_t inferior_ptid = thread_to_gdb_id (current_inferior);
/* FIXME: Assume for now that n == 1. */
ptid_t ptid = resume_info[0].thread;
const int request = (resume_info[0].kind == resume_step
? PTRACE_SINGLESTEP : PTRACE_CONT);
const int signal = resume_info[0].sig;
if (ptid_equal (ptid, minus_one_ptid))
ptid = thread_to_gdb_id (current_inferior);
regcache_invalidate ();
lynx_ptrace (request, inferior_ptid, 1, signal, 0);
lynx_ptrace (request, ptid, 1, signal, 0);
}
/* Resume the execution of the given PTID. */
@ -497,12 +500,12 @@ retry:
case SIGNEWTHREAD:
/* We just added the new thread above. No need to do anything
further. Just resume the execution again. */
lynx_continue (ptid);
lynx_continue (new_ptid);
goto retry;
case SIGTHREADEXIT:
remove_thread (find_thread_ptid (new_ptid));
lynx_continue (ptid);
lynx_continue (new_ptid);
goto retry;
}
}